Remove metrics dashboards

[javidahmed64592]

This pull request removes built-in support for Prometheus and Grafana monitoring from the Python Template Server project. The Docker configuration, documentation, and codebase have been updated to eliminate references to Prometheus and Grafana, simplifying the stack to focus on the FastAPI server. The most important changes are grouped below.

Docker and Deployment Configuration:

• Removed Prometheus and Grafana services, volumes, and related configuration from docker-compose.yml. The stack now only includes the FastAPI server and essential volumes. [1] [2] [3]
• Updated the Dockerfile to stop copying grafana/ and prometheus/ directories, and removed setup steps for monitoring configs. [1] [2] [3]
• Cleaned up the CI workflow in .github/workflows/build.yml by removing checks and directory listings for Prometheus and Grafana. [1] [2]
• Removed health checks for Prometheus and Grafana from the custom GitHub Action.

Documentation Updates:

• Revised README.md, docs/API.md, and docs/DOCKER_DEPLOYMENT.md to remove all references to Prometheus metrics, Grafana dashboards, and related endpoints. Documentation now focuses solely on the FastAPI server and its features. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11]

Internal Project Structure:

• Updated project guides and instructions to remove setup and references for metrics middleware, Prometheus handlers, and Grafana dashboards. [1] [2] [3] [4] [5]

These changes streamline the project by removing external observability dependencies, making the template easier to deploy and maintain.